First clarify that the process cannot catch this SIGSYS signal.
While the text currently says that, it's easy (IMO) to read
ambiguously and that it's referring to default behavior (no
handler -> process exits).
Then add details regarding coredump behavior. Before Linux 4.11,
there was no way to get coredumps from such crashes. Now we can
at least get crashes from single threaded processes.
Signed-off-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
ld.so.8: Expand DT_RUNPATH details.
Every 3 years we get asked why DT_RUNPATH doesn't work like DT_RPATH.
The most recent question was here:
https://www.sourceware.org/ml/libc-help/2017-06/msg00013.html
We need to expand the description of DT_RUNPATH to cover this situation
and explain that the DT_RUNPATH entries apply only to the immediate
DT_NEEDED, not that of another, say dlopen'd child object.
Applies to master.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
In glibc we just finished a round of purging 'struct ucontext'
which is not in the POSIX reserved namespace of *_t tags. This has
some consequences to applications using the non-standard struct
ucontext:
https://sourceware.org/glibc/wiki/Release/2.26#Removal_of_.27struct_ucontext.27
but it also fixes a namespace conformance issue which is always a
longterm pain for large portable programs.
It was noted by Peter Maydell
(https://sourceware.org/bugzilla/show_bug.cgi?id=21457) that the
linux man pages still had references to 'struct ucontext' but only
in the form of an exemplar structure.
The patch fixes the exemplar to match what is in glibc
and therefore it won't ever suggest users can use 'struct
ucontext'.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
There is a POSIX_FADV_NOREUSE for posix_fadvise(),
but no POSIX_MADV_NOREUSE for any API in POSIX.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
POSIX_FADV_NOREUSE is documented for posix_fadvise, and a
corresponding POSIX_MADV_NOREUSE flag is not specified by POSIX.
Thanks to Marc Lehmann <debian-reportbug@plan9.de>
See https://bugs.debian.org/865699
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Make the discussion clearer, and add a few details.
Also, fix the problem report from Pavel Tikhomirov
who noted that the man page falsely said that errno
is not changed on a successful return.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=195955
Reported-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Document the new GETFSMAP ioctl that returns the physical layout of a
(disk-based) filesystem.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Mike Frysinger